The couple, who wed in July 2009, welcomed their first child on Aug. 25. Faris, 35, flaunted her slim post-baby bod in tiny shorts during the outing. The new mom had a smile on her face as she walked the couple's three dogs, while Pratt, 33, pushed baby Jack in his stroller.

Pratt has recently been having fun teasing his Twitter followers into thinking he's sharing a photo of his son. Last week, the Parks and Recreation actor tweeted, "Have you ever seen a more adorable child?" and "Me and my boy's first football game together!" But the photos are actually images of feet!

And the new dad has also had fun pulling pranks on his wife! On Sept. 19, he tweeted, "Blamed that last fart on my infant son and my wife, with a very concerned look on her face, asked me if I think he's sick."